/*
 * Copyright (c) 2002-2018 ymnk, JCraft,Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions
 * and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided with
 * the distribution.
 *
 * 3. The names of the authors may not be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL JCRAFT, INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.jcraft.jsch;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.SocketException;

class IO {
  InputStream in;
  OutputStream out;
  OutputStream out_ext;

  private boolean in_dontclose = false;
  private boolean out_dontclose = false;
  private boolean out_ext_dontclose = false;

  void setOutputStream(OutputStream out) {
    this.out = out;
  }

  void setOutputStream(OutputStream out, boolean dontclose) {
    this.out_dontclose = dontclose;
    setOutputStream(out);
  }

  void setExtOutputStream(OutputStream out) {
    this.out_ext = out;
  }

  void setExtOutputStream(OutputStream out, boolean dontclose) {
    this.out_ext_dontclose = dontclose;
    setExtOutputStream(out);
  }

  void setInputStream(InputStream in) {
    this.in = in;
  }

  void setInputStream(InputStream in, boolean dontclose) {
    this.in_dontclose = dontclose;
    setInputStream(in);
  }

  void put(Packet p) throws IOException, SocketException {
    out.write(p.buffer.buffer, 0, p.buffer.index);
    out.flush();
  }

  void put(byte[] array, int begin, int length) throws IOException {
    out.write(array, begin, length);
    out.flush();
  }

  void put_ext(byte[] array, int begin, int length) throws IOException {
    out_ext.write(array, begin, length);
    out_ext.flush();
  }

  int getByte() throws IOException {
    return in.read();
  }

  void getByte(byte[] array) throws IOException {
    getByte(array, 0, array.length);
  }

  void getByte(byte[] array, int begin, int length) throws IOException {
    do {
      int completed = in.read(array, begin, length);
      if (completed < 0) {
        throw new IOException("End of IO Stream Read");
      }
      begin += completed;
      length -= completed;
    } while (length > 0);
  }

  void out_close() {
    try {
      if (out != null && !out_dontclose)
        out.close();
      out = null;
    } catch (Exception ee) {
    }
  }

  void close() {
    try {
      if (in != null && !in_dontclose)
        in.close();
      in = null;
    } catch (Exception ee) {
    }

    out_close();

    try {
      if (out_ext != null && !out_ext_dontclose)
        out_ext.close();
      out_ext = null;
    } catch (Exception ee) {
    }
  }

  /*
   * void finalize() throws Throwable{ try{ if(in!=null) in.close(); } catch(Exception ee){} try{
   * if(out!=null) out.close(); } catch(Exception ee){} try{ if(out_ext!=null) out_ext.close(); }
   * catch(Exception ee){} }
   */
}
